USB-SERIAL COMMUNICATIONS ON RASPBERRY PI 3 B+

I have ExaGear Desktop for Raspberry Pi 3 B+ and use WINE to successfully launch an x86 program.  The x86 program needs to communicate with a device using a USB-serial adapter.  So far I have not figured out how to get the x86 program to recognize the USB-serial adapter.

On a Windows laptop, we install USB Driver: CH341SER.exe and it just works without any troubleshooting or further configuration.  I tried but it wasn't as simple as installing the CH341SER driver software using WINE on the Pi.

The endgame is to create a portable "black box programmer" to change motor control settings on my Bafang powered eBike.

http://wiseinnovationtechnologies.com/programming-your-bafang-motor/
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Lance McGrewRETIREDAsked:
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David Johnson, CD, MVPRetiredCommented:
it won't work, why don't you just make a serial connector and connect it to the gpio
RXD pin 10, TXD pin 8, GND pin 6

you will have to enable uart in the config file
https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=141195

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nociSoftware EngineerCommented:
Wine doesn't connect serial ports through USB....
That is to say Wine doesn't handle USB.

This may work;    first create a serial port under linux and the export that serial port in Wine as COM1, COM...
See this:    https://www.onetransistor.eu/2015/12/wine-serial-port-linux.html
Lance McGrewRETIREDAuthor Commented:
The motor control requires power for programming.  That is why they use USB-serial adapter to supply voltage and data.  The idea of using GPIO header seems like a viable idea.
image_10636.jpg
nociSoftware EngineerCommented:
be aware that  USB is the power rail on the Raspberry for 5V, GPIO = 3.3V and behind a power convertor (so limited power, few mA).
Power for motors SHOULD realy be from other sources.  if 5V is sufficient then the USB powerrail should be sufficient, as long as the Powersupply can deliver. (well not 10A... ;-)  )

There are motor controls for the RPi (as a HAT)  that have separate power supplies, either using relays or H coupled transistors.
Lance McGrewRETIREDAuthor Commented:
Both contributors provided great suggestions to my original request and I appreciate their time.
nociSoftware EngineerCommented:
Good luck with your project, RPi's can be fun ;-)
Lance McGrewRETIREDAuthor Commented:
noci said This may work;    first create a serial port under linux and the export that serial port in Wine as COM1, COM...
See this:    https://www.onetransistor.eu/2015/12/wine-serial-port-linux.html

Following the instructions produced a working solution.  Thank you noci for your contribution.
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